is one piece episode 671 filler?

Trébol notices a fly, and using his devil fruit powers, he shoots the fly with enough force to knock it through the wall of the executive tower. This scares all the dwarves, but Leo boasts that even if he can hit a fly, he will not be able to hit him, and runs towards the tower.

As the other dwarves and Usopp cheer Leo on, Robin stops him. Inside the SMILE Factory, an overseer is forcing the dwarves to work in the SMILE fields.